Jülich Plant Science Seminars (JPSS) - Yusaku Uga - Challenges in root-ideotype breeding for developing crops adapted to the era of climate change - Jülich, IBG-2 Plant Sciences - 10. Juni 2024

Einladung zum Jülicher Pflanzenwissenschaftlichen Seminar (JPSS/BioSC Lecture) - Yusaku Uga

10.06.2024 12:00 Uhr
10.06.2024 13:00 Uhr
IBG-2: Plant Sciences, building 06.2, room 406 – large seminar room, 2nd floor

Contact: Institute of Crop Science, National Agriculture and Food Research Organization (NARO), Tsukuba, Japan (yuga@affrc.go.jp)

Abstract: Global climate change triggers increased abiotic stresses such as drought and heat in agricultural land. Developing crops adapted to such stresses will be essential in achieving sustainable crop production in a hostile environment. Also, greenhouse gas (GHG) emissions in the agricultural sector are an important global issue. Especially in Asia, there is a demand to reduce methane emissions, the significant GHG next to CO2. Root system architecture (RSA) is one of the critical factors to sustainable agriculture and low GHG emissions under climate change. Hence, RSA breeding should be considered an option to solve such problems. Conventional breeding of RSA based on phenotypic selection is difficult because of the roots hidden underground. As an alternative, ideotype-based breeding using its-related genes that does not require phenotypic selection could be one of the promising breeding strategies for RSA.

JPSS - Yusaku Uga - Challenges in root-ideotype breeding for developing crops adapted to the era of climate change

Our group has cloned two rice quantitative trait loci (QTLs) for root growth angle, DRO1 and qSOR1, which is one of the DRO1 homologs in rice. We created four introgression lines having different RSA types in rice through QTL pyramiding of functional and non-functional alleles in the DRO1 and qSOR1 genes. Using these lines, we have demonstrated that a steeper-rooted allele of DRO1 improves drought avoidance in rice. Recently, we also found that the steeper-rooted allele of DRO1 reduces methane emission in paddy. These results suggest that we could develop a breeding line with the desired RSA without phenotypic selection in the field. So, applying root-related QTLs would facilitate the development of climate-resilient and low-methane-emitting rice. However, identifying the ideal RSAs critical for crop production under abiotic stress remains a challenge, primarily because the underground location of the roots inhibits visual analysis. We launched a non-destructive 4D root phenotyping platform using X-ray CT imaging to visualize the RSA. Using this platform, developing a design for an ideal RSA that is robust to abiotic stress is ongoing.

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Letzte Änderung: 22.05.2024